Toolholder



April 29, 1952 E. c. CRAWFORD 2,594,402

TOOLHOLDER FiledAug. so, 1949 m i I INVENT OR.

ATTEIRN EYS Patented Apr. 29, 1952 UNITED srArss PATENT orrlcsTOOLHOLDEK Elijah: C. Crawford,,Ghicagmllh Application August 30,1949,,S erial No. 113,212

s Claims.

l I Ihis invention relates to" a tool holder; and m'creparticularly toaholder for clamping a rotary tool, such as an edge setter, onto arotating shaft; such as a shaft on a shoe repairing'machine.

The object of the invention is to provide a holder whereby the tool canbe clamped onto or removed from the end. of a rotary shaft without thenecessity of stopping the rotation of the shaft.

Another object of the invention is to provide a tool holder for clampinga tool onto a rotary shaft of a machine whereby the tool can beattachedor detached from a rotary shaft quickly andsafely and withoutstopping'rotation of the shaft. so. that the work of others using themnchinewill not be interfered with.

A. further object of the invention is to provide a toclholderi which isextremely simple and inexpensive to manufacture.

Gther objects andadvantageswill be apparent during the. course of. the.following. description.

In the. accompanying drawings, forming. a part of this applicatiouandinwhich like numerals are used to. designate like parts throughout thesame:

Figure 1 is a side elevational View, illustrating" the tool holderconnecting an edge setting tool to a shaft, according to the presentinvention, the tool being shown in section;

Figure 2 is a longitudinal sectional view through the assembly of Figure1.

Referring in detail to the drawings, there is shown'an end of a shaftif) that may be part of any machine, such as a machine used by thoseengaged in the repair of shoes. The present invention' is directed to aholder for clampin a rotary tool, such as an edge setter, onto the endof the shaft l0, and by using the holder of the present invention, it isnot necessary to stop the rotation of the shaft ID in order to detach orattach the tool onto the shaft Hi as later described in thisapplication.

The holder of the present invention comprises a body member I l which isprovided with an interior socket R2 for receiving therein the end of theshaft Ill. Suitable securing elements, such as screws l3, Figure 1,project through the body member I! and into engagement with the shaft (6for maintaining the body member ll on the shaft H3.

The body member I l is shaped to define a support member M whichprojects from an end thereof, and mounted on the support member as isthe edge setting tool it, the tool [5 abutting a shoulder IE on thesup-port member M.

Extending through the support member l4, andthrough'the body member I Iisa central bore H which has a plunger l8 slidably" arranged therein. A;screw" or closure member I9 is threadedinto the inner end of the bore[1, and a coil' spring 20 is positioned in the bore I! and interposedbetween the closuremember I 9 and't'h'e plunger is, Figure 2. The coilspring '20 serves to'normally urge the plunger lB'out of the borel 'l.

The edge setting tool I5 is provided witha; central socket 2! throughwhich projects the support member is". Further the tool Ibis providedwith an inner grooveor recess 22 which extendslongitudinally"therethrough for a;- portion of its length; r I

A look pin 23 has one of its ends pivotally con"- nected tothe' plungerIt by means of a pin 24,

' and the 'other'end of thepi'n-ZS is pointed asat25,

thepointed end 25 adapted to seat inlthe groove Z2in the tool I5. Thepin 23projects throug'hacutout 2B in the support member I4, and theplunger I8 is cutaway; asatZ'l, toprovide a'mpl'e clearancefor'themovement of the pin 23. A pin 28 projects'through'the support member" 14and into engagement with the plunger l8, there being acutaway'orcut' out29 in the plunger I 8 to allow the" pin. 28 to ride thereilf'as' theplunger I8 is move'd'in'th'e bore! 1.

Secured to the outer projecting end of the plunger i8 is. a knob 30.The" knob 30 includes a collar 32 that embracesthe'plunger l B, andsuitable set screws 33 projectthrough the collar--32 for securing theknob to the plunger 18 The knob 3Bi's provided with around head 3| forapurpose to be later described.

From the foregoing; it is apparent that'a-holder has. been providedwhereby a tool, such as the annular edge setter I5, can be readilyattached to or detached from the rotating shaft Ill without thenecessity of stopping the rotation of the shaft I0. Thus, to remove thetool l5, from the shaft 10, the user merely manually depresses theplunger l8 against the coil spring 20 until the end 25 of the pin 23 isfree from the groove 22 in the tool l5. Then, the tool I5 can be readilyremoved from the support member [4.

Similarly, the tool [5 can be readily attached to the shaft III bydepressing the plunger l8, then positioning the tool l5 on the supportmember 14, and then releasing the pressure on the plunger 1 8 whereuponthe spring 20 will move the plunger It to the position shown in Figure2, so that the end 25 of the pin 23 will move into the groove 22 wherebythe tool [5 will be locked onto the support member Hi. It will be seenthat rotation of the shaft l causes rotation of the body member II, andthis in turn causes the plunger l8 and the edge setting tool l torotate.

The device of the present invention is especially useful for shoerepairing machines, so that it is not necessary to stop the operation ofthe machine in order to change an edge setter. Further, the knob 30 hasa rounded head 3! so that the users hand will not be injured during thedepression of the plunger [8. Further, the knob 30 can be used to opennarrow welts instead of using hand tools, or else, the knob can be usedfor rubbing down stitches on welts after shoes have been sewed. Also,the rounded head 3| provides a means for smoothing sewed or cementedpatches on the upper part of shoes and the like. Other tools, besidesthe edge setter I5 can be attached to the shaft l0; thus, emery wheels,wire brushes, stitching pickers, and the like can be used in place ofthe edge setting tool I5.

What I claim:

1. In a holder for clamping a tool to the end of a shaft, said toolhaving a groove arranged centrally therein, a body member provided witha socket for receiving therein the end of the shaft, means for securingsaid body member to said shaft, a support member projecting from an endof said body member and being of a smaller diameter than the latter, anannular shoulder on said support member of smaller diameter than saidbody member but of larger diameter than said support member, there beinga bore extending through said support member and communicating with saidsocket, a, plunger slidably arranged in said bore, a pin having one endpivotally connected to said plunger and its other end mounted formovement into and out of engagement with the groove in said tool,resilient means abutting said plunger for urging said pin intoengagement with the groove in said tool, and a second pin in saidshoulder engaging said plunger to limit the movement thereof.

2. In a holder for clamping a tool to the end of a shaft, said toolhaving a groove arranged centrally therein, a body member provided witha socket for receiving therein the end of the shaft, means for securingsaid body member to said shaft, a support member projecting from an endof said body member and being of a smaller diameter than the latter, anannular shoulder on said support member of smaller diameter than saidbody member but of larger diameter than said support member, there beinga bore extending through said support member and communicating with saidsocket, a plunger slidably arranged in said bore, a pin having one endpivotally connected to said plunger and its other end mounted formovement into and out of engagement with the groove in said tool,resilient means embodying a coil spring positioned in said bore andabutting said plunger for urging said pin into engagement with thegroove in said tool, and a second pin in said shoulder engaging saidplunger to limit the movement thereof.

3. In a holder for clamping a tool to the end of a shaft, said toolhaving a groove arranged centrally therein, a body member provided witha socket for receiving therein the end of the shaft, means for securingsaid body member to said shaft, a support member projecting from an endof said body member and being of a smaller diameter than the latter, anannular shoulder on said support member of smaller diameter than saidbody member but of larger diameter than said support member, there beinga bore extending through said support member and communicating with saidsocket, a plunger slidably arranged in said bore, a pin having one endpivotally connected to said plunger and its other end mounted formovement into and out of engagement with the groove in said tool,resilient means embodying a coil spring positioned in said bore andabutting said plunger for urging said pin into engagement with thegroove in said tool. a knob secured to the exterior projecting end ofsaid plunger, and a second pin in said shoulder engaging said plunger tolimit the movement thereof.

4. In a holder for clamping a tool to an end of a shaft, said toolhaving a groove arranged centrally therein, a body member provided witha socket for receiving therein the end of the shaft, securing elementsfor fastening said body member to said shaft, a support member ofreduced diameter projecting from an end of said body member, there beinga bore extending through said support member and communicating with thesocket in said body member, a plunger slidably arranged in said bore, aclosure member threaded into an end of said bore, a coil springpositioned in said bore and interposed between said closure member andplunger, a knob secured to the outer projecting end of said plunger,there being a cut out in said support member,

and a pin having one end pivotally connected to said plunger andprojecting through said cutout into the groove in said tool.

ELIJAH C. CRAWFORD.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 1,760,843 Hasty May 27, 19302,009,371 Junge July 23, 1935 2,251,470 Stacey Aug. 5, 1941

